Double-hammer bell



(No Model.) V

F. O. LANDGRANE DOUBLE HAMMER BELL.

PatenfiedNov." 11, 1884.

N. PETERS. Pholo-whn n hnr. Wilhinglnll. ac

m a I Unirnn STATES.

PATENT rrrcir.

FRANK O. LANDGRANE, OF SAN FRANCISCO, CALIFORNIA.

DOUBLE-HAMMER BELL.

EPECIFICATION forming part of Letters Patent No. 307,860, dated November 1],, 1884-.

- Application filed May 5, 1884.

at the rear of the car.

It consists of the single gong or bell suitaably supported, and having a pair of hammers arranged to be operated from opposite sides, with returning-springs andvstops, all of which will be more fully described by reference to. the accompanying drawings.

Figure 1 is a view of the gong from below, one of the hammers being shown in dotted lines drawn down to strike, also stops by which the motion of the hammer is limited, and the return-springs. Fig. 2 is a vertical section taken through the gong and its support.

In street-cars which are drawn by a single horse, and in some others, it is customary to have the cords by which the passengers or conductor notify the driver, to lead along the sides of the car, so as to be within reach of passengers while sitting on the seat, and has hitherto necessitated the use of one gong for each cord, these gongs being fixed beneath the roof which projects over the drivers platform-one at each side. These gongs cannot be heard as well when so situated, and must be made somewhat smaller, and the two would be more expensive than the single one.

' In my invention,A is the bell or gong, which may be of large diameter, having a central standard, B, fixed on a plate, 0, which is screwed to the roof of the car at the center above the drivers head. This plate 0 has extensions D projecting on each side of the center in front of the bell, and the shanks E of the hammers are pivoted to these arms. These hammers carry the striking part F on their outer end, and the shanks are bent outward at G, so as to form what is termed a bell-crank.

H is a stop centrally placed between the (No model.)

two arms D of the plate 0, against which the inner sides of the arms G rest when the hammers are raised away from the bell.

I are springs which press upon the hammerarms upon the opposite side of their pivotpoints from the arms G, the tendency of these springsvbeing to force the hammers away from the bell. Y

J are small projecting lugs which are formed to strike against shoulders on the sides of the plate 0 when the hammer is drawn down, and just before it strikes the gong or bell, so that when it is pulled down strongly the hammer will spring forward and strike the gong, and this lug will hold it off a short distance, so as to allow the gong to have clear vibration. Cords or wires K lead from the outer ends of the arms G away from them in lines at right angles with the length of the car, and the direction is changed by bell-cranks L at the outer sides. They extend thence into the car along the sides beneath the roof in the usual manner. By this construction passengers sitting upon the seats on either side of the car may notify the driver by means of the single gong and the two lines and theitwo hammers. The bell or gong, being situated directly over the drivers head, will be more, readily heard and not mistaken for that of another car which maybe passing. It may also be made considerable larger, as it is more out the way than those at the sides, and one gong of the larger size will be considerably cheaper than two of the smaller.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The gong with its standard and supporting-plate, the springs I, and the hammers having shanks formed with T-shaped ends, the centers of which are pivoted to the sides of the plate, one of these ends serving for the attachment of an operatingcord, while the other is acted upon by springs to raise the hammer from the gong, as herein described.

2. The gong with its standard, supportingplate, with extensions upon each side for the attachment of the hammer shanks, central stops or lugs, H, against which these shanks rest when the hammers are out of action, the IOO arms Gplnd the springs I for raising" the hamto limit the movement of the shanks, as herein 1o mer, as described. I described.

3. The gong with its standard, the central In Witness whereof I have hereunto set my supporting-plate upon either side of which hand. 5 the hammer-shanks are pivoted, the springs I,

and armsat one side of the pivot forthe attach.- FRANK LANDGRANE' ment of operating-cords and upon the other Witnesses: side of the pivot against which returning- S. H. NOURSE,

springs act, together with the lugs or stops J, H. 0. LEE. 

